You could use practically any NW American hop for finishing in this type of beer, but there’s no good reason at all not to just finish with the hops you’re already using for bittering. Those are classic American hops that are just as good for finishing as they are for bittering. If you really insist on using something else, though, there are some great finishing hops coming from down under these days. I’ve used Pacific Gem and Pacific Hallertau in my pale ales to great effect several times, and there are numerous other varieties from Australia and New Zealand that I haven’t tried yet. Just a suggestion.